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The apparel industry has increasingly embraced seamless garment construction as a means of improving both product performance and consumer comfort. By replacing conventional sewing with adhesive bonding, seamless manufacturing enhances garment aesthetics while reducing skin irritation, improving fit, and increasing wind resistance and thermal insulation in applications such as underwear, sportswear, and winter clothing. Traditionally, urethane-based hot-melt adhesives have been used for fabric bonding; however, these materials often suffer from limitations including yellowing, texture deterioration, and reduced durability over time. As a result, there is growing demand for alternative adhesive technologies that can provide both strong adhesion and long-term performance while maintaining the flexibility required for textile applications. Solvent-based acrylic pressure-sensitive adhesives offer advantages such as excellent weather resistance, light stability, and flexibility in molecular design, making them attractive candidates for advanced fabric-bonding applications. To address the challenges associated with conventional textile adhesives, Toagosei developed ARONTACK MPT-500, a novel acrylic pressure-sensitive adhesive based on triblock polymer technology that balances cohesion, flexibility, and thermal flow characteristics. This paper examines the development, adhesive performance, durability, and application potential of ARONTACK MPT-500, highlighting its suitability for seamless clothing and other fabric-bonding applications.